I have a Dual Sim Xperia Z3 (Model D6633) that I want to either sale or trade. This model gets both ATT and T-Mobile LTE bands. If 2 sims is inserted, both sims work at the same time. Meaning the phone will have two numbers. When making a call or sending a text, you decide with sim to use (sim 1 or sim 2). You can also set the phone up whereas if sim 1 is ATT and sim 2 is T-Mobile and T-Mobile has bad service, the call will automatically switch to the ATT sim. As far as data goes, the device gets both ATT and T-Mobile LTE. You select which sim you want to use for data.

The condition is not mint..mint means like new condition to me. I would say it's in great condition. It has some light scratches on the camera lens. But the scratches do not in any way affect the quality of the pics. The phone's back also has some light scratches on it. But that's from siting the phone phone on the table tops and taking it in and out of my pockets. The phone also have a small little chip on it (see the pic)